JPH0612135Y2 - Formwork fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mold fixing device for fixing the position of a mold when pouring concrete into the mold.

[Conventional technology]

For example, when constructing a foundation with concrete, concrete is poured into a formwork and then cured. When pouring this concrete into the frame, it is necessary to fix the mold so that the pressure of the concrete does not cause the mold to bend or move.

Conventionally, when pouring concrete into a formwork, as shown in FIG.
Drive into the ground. And the formwork A and B is arrange | positioned along the inside of this pair of piles 21 and 22, and it winds between the head parts 21a and 22a of the piles 21 and 22 with the iron wire 23 etc. Fix the interval of 22.

At this time, a support rod C is provided between the molds A and B so that the molds A and B do not fall inward, and then concrete is poured between the molds A and B. The molds A and B are made of, for example, rectangular steel plates, and as shown by the alternate long and short dash line in the figure, a plurality of molds A and B are continuously installed in the longitudinal direction.

[Problems to be solved by the invention]

However, in such a method, since a pair of piles 21 and 22 must be driven one by one, not only positioning cannot be performed accurately, but also there is a problem that it takes time. In addition, at the time of this pile driving, one person must support the piles 21 and 22, and the other person must hit the heads 21a and 22a of the piles 21 and 22 with a hammer or the like. Is necessary. Further, since it is necessary to wind between the heads 21a and 22a of the piles 21 and 22 with the iron wire 23 or the like so that the molds 1 and 2 do not spread to the outside, it takes time to wind the iron wire 23 and the like. There is.

Further, when the pressure applied to the molds A and B becomes large during the pouring of the concrete, the iron wire 23 may be unable to withstand the load and may come off or be cut. Therefore, it is necessary to install another fixing rod (not shown) between the molds A and B and the wall surface of the groove in which the foundation is embedded to support the side surfaces of the molds A and B. Since the fixing rod must be cut and its length adjusted according to the situation of the installation site, it takes time to perform these preparatory work. Further, once the fixing rod has been cut, it cannot be reused, and the material is wasted.

Furthermore, when the forms A and B are to be removed after the concrete has hardened, the iron wire 23 must be removed and the piles 21 and 22 must be removed independently and sequentially, which is also troublesome.
Moreover, since the iron wire 23 that has been used once cannot be reused, it becomes a consumable item and the economical efficiency deteriorates.

The present invention has been devised in order to solve the above-mentioned problems, and it is possible to simplify the installation and removal of the mold to shorten the working time and to fix the mold accurately and surely. To aim.

[Means for solving problems]

The formwork fixing device of the present invention solves the above problems.
A formwork fixing device comprising a pair of legs and a connecting portion for connecting between the heads of the pair of legs, wherein each leg of the pair of legs comprises an iron L-angle. , An inclined portion having an acute angle is formed at a lower end thereof, and the connecting portion is a pair of pipes having different diameters, and a small diameter pipe is slidable in a large diameter pipe at each one end side. The pair of pipes each having the other end side fixed to the heads of the pair of legs, and a fixing bolt is provided on one of the pair of pipes forming the connecting portion. A through hole for penetrating is formed, a long groove is formed in the other pipe in the longitudinal direction, and a plurality of notches communicating with the long groove and engaging with the fixing bolt in the circumferential direction of the pipe are provided. It is characterized by being

〔Example〕

Hereinafter, features of the present invention will be specifically described based on embodiments with reference to the drawings.

FIG. 1 is a perspective view of a form fixing device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a use state of the form fixing device.

In the figure, reference numeral 1 denotes a mold fixing device, which is generally U-shaped. This formwork fixing device 1 is composed of a pair of legs 2 and 3 and a connecting portion 4 having a double pipe structure for connecting between the heads 2a and 3a of the pair of legs 2 and 3. There is.

The legs 2 and 3 are made of iron L-angles, and the inclined portions 2b and 3b having acute angles are formed at the lower ends thereof. On the side of the upper ends of the legs 2 and 3, reinforcing members 2c and 3c of L-angle made of iron are welded to face the L angles forming the legs 2 and 3 to form a rectangular tubular body. Further, on the upper portions of the heads 2a and 3a of the legs 2 and 3, the iron lids 2d and 3 are formed so as to cover the openings of the tubular body.
d is welded.

Next, a connecting portion 4 for integrally connecting these leg portions 2 and 3
Will be described.

One ends of the iron pipes 5 and 6 forming the connecting portion 4 are welded to one side surface of the head portions 2a and 3a of the leg portions 2 and 3, respectively. The pipes 5 and 6 have different diameters, and the small-diameter pipe 6 can be slidably inserted into the large-diameter pipe 5.

Two pairs of through holes 51 and 52 are vertically penetrated through the large-diameter pipe 5 with a certain interval in the longitudinal direction. In addition, a long groove 61 is formed in the longitudinal direction in the small-diameter pipe 6, and a plurality of notches are formed in the circumferential direction of the pipe 6 at intervals corresponding to the intervals between the through holes 51 and 52 that communicate with the long groove 61. 62, 63, 64 are provided. Although not shown, a long groove and a plurality of cuts similar to the long groove 61 and the cuts 62, 63, 64 are formed at symmetrical positions with respect to the axis of the pipe 6. The long groove 61 is formed so as to be slightly deviated from the axial direction parallel to the leg portion 3 in the circumferential direction of the pipe 6, and a plurality of cuts 62, 63, 64 are formed.
Are formed so as to coincide with the axial direction.

Then, the small diameter pipe 6 is inserted into the large diameter pipe 5, and the pair of bolts 7 and 8 are inserted through the through holes 51 and 52 provided in the pipe 5 and the long groove 61 provided in the pipe 6, After fitting the washers 7a and 8a, the nuts 7b and 8b are screwed together. As a result, the pipe 5 and the pipe 6 are fitted together in a slidable manner in the longitudinal direction of the connecting portion 4.

Next, a procedure for constructing a concrete foundation using the formwork fixing device 1 will be described.

First, the length of the connecting portion 4 is adjusted according to the width of the concrete foundation to be constructed. That is, by rotating the small-diameter pipe 6 toward the large-diameter pipe 5 to the right, the positions of the bolts 7 and 8 and the long groove 61 are aligned, so that both pipes 5 and 6 are arranged in the longitudinal direction of the connecting portion 4. It becomes slidable, and the length of the connecting portion 4 can be adjusted by expanding and contracting the connecting portion 4.

Here, if the small-diameter pipe 6 is rotated counterclockwise with respect to the large-diameter pipe 5 in accordance with the positions of the bolts 7 and 8 according to the positions of the notches 62 and 63 or the notches 63 and 64, the bolts 7 and 8 are notched. The two pipes 5 and 6 are fixed in the longitudinal direction by engaging with the slits 62 and 63 or the notches 63 and 64. In this way, the distance between the leg portions 2 and 3 welded to the pipes 5 and 6 can be fixed by the combination of the positions of the bolts 7 and 8 and the positions of the notches 62, 63 and 64. Therefore, if the positions of the cuts 62, 63, 64 are determined in advance according to the width of the basic concrete to be constructed, both pipes 5,
It is possible to keep the distance between the legs 2 and 3 fixed to the base end of 6 constant. Moreover, the distance between the legs 2 and 3 can be changed by a simple operation of slightly rotating the pipes 5 and 6.

Next, the formwork A and B are laid down on the ground where the foundation is constructed.

Next, the mold fixing device 1 is arranged so as to straddle the molds A and B, and as shown in FIG.
B is raised, and the legs 2 and 3 are driven into the ground in this state. At this time, a support rod C is provided between the molds A and B so that the molds A and B do not fall inward. As a result, the molds A and B are sandwiched between the support rod C and the legs 2 and 3, so that the molds A and B and the mold fixing device 1 are self-supporting. Therefore,
It is not necessary to support the molds A and B by obtaining them, and the heads 2a and 3a of the legs 2 and 3 can be alternately hit by one person to drive the legs 2 and 3 into the ground. The mold fixing device 1 can be installed quickly and easily while keeping the distance between the three constant.

At this time, since the heads 2a and 3a of the legs 2 and 3 are cylindrical and the upper ends thereof are covered with the lids 2d and 3d (see FIG. 1), the legs are covered with a hammer or the like. Even if you hit the heads 2a, 3a of a few, you can fully receive the impact force,
There is no fear of deformation.

After that, concrete is poured between the molds A and B. Due to this pouring of concrete, the outward force is applied to the molds A and B. Therefore, the support bar C can be removed when the concrete is poured to some extent. When concrete is poured further, due to the pressure of the concrete, the molds A and B tend to fall outward,
Since the outer sides of the molds A and B are pressed by the legs 2 and 3, the molds A and B are not bent or displaced. At this time, since the head portions 2a and 3a of the two leg portions 2 and 3 are firmly connected by the connecting portion 4 having the pipe structure,
3 does not bend outwards. Therefore, it is not necessary to provide an auxiliary fixing rod as in the conventional case.

Also, when pouring concrete between the forms A and B,
Concrete will also fall on the connecting part 4, but the bolt 7,
Most of the axis of 8 will be located in pipes 5,6. Therefore, it is less likely that concrete will adhere to the shafts of the bolts 7 and 8 and harden to make it difficult to remove the bolts 7 and 8.

Next, after the concrete has hardened, it is necessary to remove the molds A and B, but according to this embodiment, in the state shown in FIG. 2, the connecting portion 4 of the mold fixing device 1 is moved upward. The legs 2, 3 and the connecting portion 4 can be removed as a unit by pulling them up. Therefore, the number of steps of the removal work is reduced and it does not take much time.

Further, the removed formwork fixing device 1 can be repeatedly used without consuming the iron wire and the like as in the conventional case, and therefore is highly economical.

In addition, in this embodiment, three cuts are made in the pipe 6.
62, 63, 64 are provided so that two types of intervals between the legs 2 and 3 can be selected, but the number is not limited to this, and three or more types can be selected by increasing the number of cuts. Becomes

[Effect of device]

As described above, according to the present invention, the form fixing device can be driven into the ground with the pair of legs integrated. Therefore, the form fixing device can be installed very easily in a state where the distance between the legs is accurately maintained. Also, when the width of the foundation to be constructed changes, this can be easily dealt with by expanding and contracting the connecting portion. Further, when the concrete is poured between the molds, the pressure of the concrete applied to the molds is surely received by the connecting portion, so that the positions of the molds or the legs are not displaced. Therefore, it is not necessary to provide an auxiliary fixing rod or the like as in the related art, and the preparatory work for this is unnecessary. Further, even in the case of the removing work, the form fixing device can be integrally removed, so that the work is simplified. It should be noted that when the construction work is actually performed using the mold fixing device of the present invention, the working time can be shortened to less than half as compared with the conventional method.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a mold fixing device according to an embodiment of the present invention, FIG. 2 is a perspective view showing a use condition of the mold fixing device, and FIG. 3 is a perspective view showing a conventional mold fixing method. . 1: Formwork fixing device, 2, 3: Legs 2a, 3a: Head, 2b, 3b: Inclined parts 2c, 3c: Reinforcing material, 2d, 3d: Lid 4, Connection parts, 5, 6: Pipe 7 , 8: Bolt, 7a, 8a: Washer 7b, 8b: Nut, 51, 52: Through hole 61: Long groove, 62, 63, 64: Notch A, B: Form

Claims (1)

[Scope of utility model registration request] 1. A pair of legs and a space between the heads of the pair of legs.
It is a formwork fixing device consisting of a connecting part that connects
And each leg of the pair of legs is composed of an iron L-angle.
The lower end is formed with an inclined part having an acute angle.
The connecting portion is a pair of pipes having different diameters.
There is a small diameter pipe inside a large diameter pipe at each end.
Can be slidably inserted, and the other end of each pair
Consists of a pair of pipes fixed to each head of each leg
The one of the pair of pipes forming the connecting portion is
A through hole is formed for the fixing bolt to penetrate, while
The pipe has a long groove formed in the longitudinal direction and is connected to this long groove.
Through and engage the fixing bolt in the circumferential direction of the pipe.
Formwork having a plurality of cuts
Fixing device.